Support pillow



FIG. 1 is a top right side perspective view of my new support pillow;

FIG. 2 is a left side elevation;

FIG. 3 is a bottom plan view;

FIG. 4 is a top plan view;

FIG. 5 is a rear elevation; and,

FIG. 6 is a front elevation. 

The ornamental design for a support pillow, as shown and described. 